232 MORPHOLOGY AND EVOLUTION
(4) Articular arteries to the temporo-inaxillary joint.
(5) Buccal artery (B.A.), which accompanies the long buccal nerve into the face.
(6) Posterior superior dental artery (P.S.D.) to the gums round the molar teeth.
(7) Small vessels to the suctorial pad of fat (S.P.F.). (8; Two deep temporal arteries (D.T.A.), which divide
and anastomose within the temporal muscle.
C.—In the Pterygo-maxillary region:—
(1) Infra-orbital artery, which passes to the face. It supplies the incisor and canine teeth and the skin and muscles of the upper lip.
(2) Descending palatine artery to the soft palate, gums and mucous membrane of the mouth.
(3; Ptenjgo-palatine and spheno-palatine arteries to the pharynx, nose, Eustachian tube, sphenoidal sinus and ethraoidal air cells.
The occipital artery arises from the beginning of the external carotid artery and runs upwards and backwards under the cleido-mastoid and splenius capitis to end among the muscles of the neck. It gives off the posterior auricular artery to the auricle and parotid gland, the descending cervical artery to the muscles of the neck, and muscular brandies to the muscles of the sub-occipital triangle,
The ascending pharyngeal artery (fig. 30, A.P.A ) runs upwards. Close to the basis cranii it curves laterally and passes into the jugular foramen. It supplies the pharynx and the soft palate with its muscles. Its branches form an arterial circle, whence twigs run to the pharyngeal tonsil.
The internal carotid artery has no cervical branches. It runs through the carotid canal in the temporal bone along with branches of the superior cervical ganglion of the sympathetic (fig. 30). It ends as in Man, and the ophthalmic artery is distributed as in the human orbit.